Governor.



K. J OHAN SEN eovmamon APPLIOATION rum) 001.27. 1908. 924,234.

Inv ant u r 'KRISTIAN JUHANSENI Patented June 8 Witnesses.-

Attur'ney K. J ORAN SEN GOVERNOR. APPLIQATION rnnn oow. 21. 1208.

I II'YIIIII- Hill Invent u r 1 5 KRISTIANJOHANSEN/ Patented June 8, 1909.

2 SHEETS-SHEET 8.

UNITED STATES KRISTIAN JOHANSEN, OF HAMAR, NORWAY.

GOVERNOR.

No. 924,234. Specification 0 Application filed October 27, 1908.

Patented June 8, 1909.

Serial No. 459,807.

1 Letters Patent.

H To all whom it may concern:

Be it known that I, KRIsTIAN J OHANSEN, a citizen of the Kingdom of Norway, residing at Nybakkens Villa, Hamar, Norway, have invented a new and useful Improvement in Motor-Governors; and I do hereby declare the following to be a full, clear, and exact description of the same.

Centrifugal governors having telescopic weights acted upon by a common spring are known. According to my invention, however, I arrange, between the weights and the active or loading spring, means which enables adjustment of the spring from either end. As a result, the mass of the spring is, at any time, balanced in relation to the axis of revolution, whereby the exactness of the governor is considerably increased. Another result assured, is that the weight and other parts at the side of the axis opposite that at which adjustment is eflected are not disturbed when the spring is adjusted or retightened. The illustrated form of the improved governor has the loading spring arranged around the telescopic connection of the centrifugal weights, one end of the spring pressing against a part connected with the foremost part of one (the inner) telescopic member through a slot in the rear part of the other (outer) telescopic member, while the other end of the spring presses against a part on the outer telescopic member.

The invention is illustrated in the accompanying drawing in which:

Figure 1 is a side elevation of the governor, the casing being shown in section. Fig. 2 is a plan view partly in section, with the casing cover removed. Fig. 3 is a vertical section on the line 33 in Fig. 2, and Fig. 4 is a side view of the governor.

The invention may be utilized in fly wheel governors as well as in vertical governors. The drawings illustrate a governor of the last-mentioned type.

The governor casing -1, the hub 2 of which is keyed on the upper end of avertical shaft 3 driven from the motor is circular and has no projecting parts. The centrifugal weights 4, 5- are guided radially and are supported near the middle of the casing 1 by four rollers 6 traveling in grooves in two parallel rails 7 attached to projections -8 on the casing wall. Recesses 9 for the rails 7- are provided in the upper sides of the weights. The outer ends of the centrifugal weights travel on rollers -10 arranged loosely beneath the same on pins 11 journaled in lugs projecting from the under side of the casing 1 (Fig. 1). Each weight is provided with side rollers -12 traveling on two parallel ribs 13 cast on the inner side of the l governor casing.

l By means of a diametrically located threaded bar -14 passing through the centrifugal weight 4. and by means of a key -15 arranged in one end of said bar the weight 4 is connected with the thrust sleeve 16 forming the support for one end of the spring 17, the key engaging a ring -18 supported by the sleeve 16 through intermediate balls -19-. The

other centrifugal weight 5 is connected with the other spring supporting sleeve 20 by means of the rotatable sleeve 21 and its threads -22, the sleeve 21 surrounding the bar -14.. The

key 15 slides in longitudinal slots -23- in the sleeve 21.

I It will be seen that the spring is quite incased in the centrifugal weights and its tension may be adjusted from outside by rotating the bar l4. This rotation is by means of the key 15, transferred to the sleeve 21 but not to the supporting sleeve 16, because the latter is journaled on balls. On the one hand the left end of the bar 14 hereby is screwed out from the weight -4, whereby the supporting sleeve -16 is moved to the left, but on the other hand the rotation of the sleeve 21 by means of the threads -22- will cause the supporting sleeve -20- to move to the right, because said sleeve does not partake of the rotation. As now the threads 22 and those of the bar 14- have the same pitch, both of the spring ends are moved together exactly the same distance, whereby a displacing of the central and symmetrical position of the spring is prevented during the tightening of the same.

' From the drawing it is seen, that the spring 17- is compressed, as soon as the weights 4, 5 move apart. The spring normally holds the weights in their inner position in engagement with the sides of a cross ring 24 attached by horizontal arms -25- to the ribs 13. The ring also serves to guide and support the spring.

On pins fixed in sockets 26 (Fig. 3) on the supporting ring -24- are pivoted two pairs of bell crank levers 27 which are connected, at one end, by links (28) with pins 29 in the centrifugal weights 4, 5 and at the other end by links (30) with two pins (31) on a sleeve 32 on the shaft 3 This sleeve slides on the shaft 3- and is in a well-known manner connected to the controlling organ of the motor. The links 28 project through recesses 33 into the centrifugal weights as illustrated in Fig. 2. The sleeve -32 is raised as soon as the weights are separated, and vice versa.

Having now I claim as new Patent is 1. In a centrifugal spring governor, the combination of two centrifugal Weights, transmission connections therefor, an inner telescoping member diametrically disposed and connected at its outer end through threads with one of said weights and connected at its inner end rotatably with a sleeve, an outer telescoping member connected at its outer end with the second weight and connected at its inner end through threads with a second sleeve, and a loading spring surrounding the telescopic members and engaging With its ends the said sleeves.

2. In a centrifugal governor, the combination of two centrifugal Weights, transmission connections therefor, an outer diametrically disposed telescoping member connected at its outer end rotatably With one of said Weights and connected at its inner end through threads with a sleeve, longitudinal slots arranged in said member near its outer end, an inner telescoping member connected at its outer end through threads with the second Weight, a cross key attached to the inner end of said inner telescoping member and having ends projecting through the said longitudinal slots, a second sleeve in rotatable engagement With the said projecting ends of the cross key, and a loading spring surrounding the telescoping members and supported at its ends by the said sleeves.

3. In a centrifugal governor, the combination of two centrifugal Weights, transmission connections therefor, an outer diametrically telescoping member connected at its outer end rotatably With one of said weights and connected at its inner end through threads With a sleeve, longitudinal slots arranged in said member near its outer end, an inner tele scoping member connected at its outer end through threads with the second Weight, a cross key attached to the inner end of said inner telescoping member and having ends projecting through the said longitudinal slots, a second sleeve surrounding the outer telescoping member near its outer portion,

described my invention What and desire to secure by Letters l l l l j I l l g i a ball bearing inserted between said second sleeve and the projecting ends of the cross key, and a loading spring surrounding the telescopic members and supported at its ends by the said sleeves.

4. In a centrifugal governor, the combination of two centrifugal weights, transmission connections therefor, an outer diametrically disposed telescoping member connected at its outer end rotatably with one of saidweights and connected at its inner end through threads with a sleeve, longitudinal slots arranged in said member near its outer end, an inner telescoping member connected at its outer end through threads with the second weight, said threads having the same pitch as that of the threads first mentioned, a cross key attached to the inner end of said inner telescoping member and having ends projecting through the said longitudinal slots, a second sleeve surrounding the outer telescoping member near its outer portion, a ball bearing inserted between said second sleeve and the projecting ends of the cross key, and a loading spring surrounding the telescopic members and supported at its ends by the said sleeves.

5. In a centrifugal governor the combination of two centrifugal weights, transmission connections therefor, an outer diametrically disposed telescoping member connected at its outer end rotatably with one of said weights and connected at its inner end through threads with a sleeve, longitudinal slots arranged in said member near its outer end, an inner telescoping member colmected at its outer end through threads with the second weight, said threads having the same pitch as that of the threads first mentioned, a cross key attached to the inner end of said. inner telescoping member and having ends projecting through the said longitudinal slots, a second sleeve surrounding the outer telescoping member near its outer portion, a ball bearing inserted between said second sleeve and the projecting ends of the cross key, a loading spring surrounding the telescopic members and supported at its ends by the said sleeves, and a rigidly attached supporting ring serving partly as a support for the middle portion of the spring and partly as a stop for the centrifugal weights in their inner position.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

KRISTIAN JOI-IANSEN.

Witnesses:

RICHARD STOKKE, MoGENs Bmoon. 

